ICD-10-CM > M00-M99 > M65-M67 > M65 > M65.1 > M65.17 M65.17 Other infective (teno)synovitis, ankle and foot Non-Billable/Non-Specific Codes M65.171Other infective (teno)synovitis, right ankle and footM65.172Other infective (teno)synovitis, left ankle and footM65.179Other infective (teno)synovitis, unspecified ankle and foot